The Great Wall RJHS-2020 Solvent Recovery System (Cryogenic Type)

Overview

The Great Wall RJHS-2020 Solvent Recovery System is a compact, cryogenically assisted vacuum distillation unit engineered for efficient reclamation of spent organic solvents in laboratory and pilot-scale industrial settings. Unlike ambient-pressure evaporation or simple condensation traps, this system integrates active low-temperature condensation (-10 °C minimum no-load temperature) with controlled vacuum operation (down to 50 mbar) to achieve selective phase separation based on vapor pressure differentials. It operates on the principle of differential boiling point reduction under sub-atmospheric pressure, enabling recovery of volatile and semi-volatile organics—including alkanes, aromatics, ketones, ethers, alcohols, nitrogen- and sulfur-containing compounds—without thermal degradation. Designed for continuous batch processing, it serves as a critical engineering control in solvent-intensive workflows where reuse directly supports cost containment, regulatory compliance (e.g., EPA 40 CFR Part 261, EU REACH Annex XVII), and adherence to ISO 14001 environmental management frameworks.

Key Features

• Cryogenic condensation module with digitally regulated refrigeration circuit, maintaining stable cold trap temperatures from −10 °C to +20 °C
• Vacuum-assisted recovery architecture with integrated 25 L/min diaphragm pump and calibrated pressure control up to 50 mbar ultimate vacuum
• Robust stainless-steel and borosilicate glass construction compliant with chemical compatibility requirements for Class I–III solvents per NFPA 30
• Digital LED temperature display with ±0.5 °C accuracy and real-time monitoring of cold trap surface temperature
• Energy-efficient design: 545 W total power draw optimized for sustained operation in standard laboratory electrical infrastructure (220–240 V~, 50 Hz)
• Compact footprint (320 × 450 × 570 mm) and modular layout facilitating integration into fume hoods or dedicated recovery workstations
• CE-marked electrical safety compliance and IP20-rated enclosure for indoor laboratory use

Sample Compatibility & Compliance

The RJHS-2020 is validated for safe and effective recovery of common industrial-grade organic solvents, including but not limited to: n-hexane, toluene, acetone, tetrahydrofuran (THF), ethanol, methanol, ethyl acetate, dimethylformamide (DMF), and low-boiling amines and thiols. It is not intended for halogenated solvents (e.g., chloroform, carbon tetrachloride), peroxides, or highly reactive species (e.g., lithium aluminum hydride residues). All wetted parts meet USP Class VI biocompatibility criteria for non-invasive contact applications. The system supports GLP-compliant documentation through manual log entry; while it does not include built-in audit trail or electronic signature functionality, its operational parameters (temperature setpoint, run duration, vacuum level) are fully recordable for internal quality review per ISO/IEC 17025 Clause 7.7.

Software & Data Management

The RJHS-2020 operates via hardware-based digital temperature control without embedded microprocessor software or network connectivity. All operational parameters—including set temperature, actual cold trap temperature, and elapsed run time—are observable via front-panel LED indicators. No proprietary software, drivers, or cloud services are required. Users maintain full traceability through manual entry into laboratory notebooks or LIMS-integrated spreadsheets. For facilities requiring 21 CFR Part 11 compliance, external data logging devices (e.g., certified USB thermocouple recorders) may be interfaced via analog output ports (available upon request as optional accessory).

Applications

• Pharmaceutical R&D labs recovering chromatographic mobile phases (e.g., acetonitrile/water mixtures) prior to HPLC method development
• Coating and ink formulation facilities reclaiming toluene/xylene blends used in viscosity adjustment and spray testing
• Electronics manufacturing cleanrooms reprocessing isopropyl alcohol (IPA) from wafer rinse stations
• Academic chemistry departments minimizing hazardous waste disposal volumes during multi-step synthesis campaigns
• Precision casting foundries recycling ethanol-based investment slurry solvents to maintain binder consistency
• Leather and textile finishing operations recovering DMF from polyurethane coating baths

FAQ

What solvents are incompatible with the RJHS-2020 system?

Chlorinated hydrocarbons (e.g., chloroform, methylene chloride), peroxide-forming ethers (e.g., diethyl ether, dioxane), and strong oxidizers (e.g., nitric acid, hydrogen peroxide solutions) must not be processed due to corrosion, decomposition, or explosion hazards.
Does the system require routine maintenance beyond filter replacement?

Yes. The refrigeration circuit requires annual inspection of refrigerant charge and condenser coil cleanliness; the vacuum pump diaphragm should be replaced every 6,000 operating hours or per manufacturer’s service schedule.
Can the RJHS-2020 be operated inside a fume hood?

Yes—its compact dimensions and absence of external exhaust venting make it suitable for installation within Class I or II biological safety cabinets or general-purpose fume hoods, provided ambient temperature remains ≤25 °C and relative humidity ≤60%.
Is calibration certification included with purchase?

A factory-issued temperature verification report (traceable to NIST standards) is provided with each unit. On-site calibration services are available through authorized regional service partners.
What safety interlocks are integrated?

The system includes over-temperature cutoff (auto-shutdown above +25 °C internal cabinet temp), motor overload protection, and vacuum loss alarm (audible alert if pressure rises above setpoint for >30 seconds).